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JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
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2021 MCA V Semester Examinations, July/August - 2021
DISTRIBUTED DATABASES
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Time: 3 Hours--- Content provided by FirstRanker.com ---
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Max.Marks:75
Answer any five questions
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All questions carry equal marks- - -
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1.What is Distributed Database? List and briefly explain advantages of Distributed
database with centralized approach.
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[15]2.
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Define Transparency. Explain in detail about the layers of transparencies in distributed
database design.
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[15]3.a)
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Discuss how query optimization is useful in distributed databases.b)
Explain about Semi-joins with example.
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[8+7]
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4.What is meant by semantic query optimization? How does it differ from other query
optimization techniques?
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[15]
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5.
What is Transaction? Explain the properties of Transactions with example.
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[15]
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6.Explain different optimistic methods for distributed concurrency control.
[15]
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7.
Explain the following
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a) Checkpointsb) Cold Restart.
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[7+8]
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8.
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Explain about Transaction and Computation Model for Distributed Multi-DBMS indetail with an example.
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[15]
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---oo0oo---
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